Desk lamp



FIG. 1 is a front view of a desk lamp, showing our new design;

FIG. 2 is a back view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a front perspective view thereof; and,

FIG. 8 is a bottom perspective view thereof.

The broken lines are included for the purpose of illustrating portions of the desk lamp that form no part of the claim design. 

CLAIM The ornamental design for a desk lamp, as shown and described. 